2020 Volume 41 Issue 4 Pages 645-653
Conventional ultrasonic welding uses one-dimensional linear vibration, which is performed in only one direction and yields low weld strength. A problem with this method is that it may be difficult to perform depending on the direction of installation. In previous studies, we showed that stable welding independent of installation direction can be achieved by using two-dimensional planar vibration. However, the reason for this was unknown. In addition, the vibration of the welding sample in welding using planar vibration has not been reported. In this paper, we investigated the effect of the installation direction on the vibration characteristics of the welding tip and the welding sample. We explained why welding using linear vibration depends on the installation direction of the welding sample, and why welding using planar vibration can achieve stable welding independent of the installation direction.
